| //id// | It may receive any string value that begins with a letter or an underscore and that only contains letters, digits, <".">, and <"_">. | The //id// attribute uniquely identifies the element within a document. |

+

| //operator// | "and" or "or". | The //operator// attribute defines a logical expression among the child elements of the [[compositerule|<compositeRule>]] element. |